Joseph Demetrius Hernandez, MD, PHD
Allergy & Immunology Physician · Palo Alto, CA
Joseph Demetrius Hernandez, MD, PHD is an allergy & immunology physician with a practice address in Palo Alto, California, and NPI 1104052232, issued on Jun 3, 2009. Check the license (California A107450, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Joseph Demetrius Hernandez
- Credential
- MD, PHD
- Primary taxonomy
- Allergy & Immunology Physician 207K00000X
- License number
- A107450 CA
Self-reported in NPPES; status is on the state search - Practice location
- 725 Welch RD, Palo Alto, CA 94304
- Phone
- (650) 497-8000
- Enumerated
- Jun 3, 2009
- Record last updated
- Apr 26, 2024
- Medicare enrollment
- Enrolled (PECOS I20130821000158); accepts Medicare assignment
- Medical or professional school
- University Of California, Geffen School Of Medicine, 2007
- Entity
- Type 1 · individual
8 nearest allergy & immunology physician records → All 444 in California → Look up another NPI →
Also registered at 725 Welch RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Shayda Abadi, NPNurse Practitioner1316745540
- Natasha AbadillaStudent in an Organized Health Care Education/Training Program1194306928
- Alexandra Abbott, MDPediatrics Physician1760018675
- Steven Abboud, MDAnesthesiology Physician1619364908
- Ali Abdelhafiz Abdelsamea, MDPediatrics Physician1699390104
- Alireza Abdollah Shamshirsaz, M.D.Obstetrics & Gynecology Physician1881804235
Verify Joseph Demetrius Hernandez in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A107450Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
The practice group's MIPS final score for 2023 (Medicare payment program): 76.5 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Lpch Medical Group Div OF LucilePalo Alto, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Joseph Demetrius Hernandez among 444 allergy & immunology physician records in California
Joseph Demetrius Hernandez, MD, PHD is one of 444 allergy & immunology physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2009, is newer than 68% of them.
- NPI issued2009 · 68% of these records are older, 29% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2007 · median 2004 among the 281 with a school on file
- Record last updated2024 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207K00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Allergy & Immunology Physician providers in California
There are 444 allergy & immunology physician records in California.
All 444 in California → Every provider in Palo Alto → Allergy & Immunology Physician nationwide →
The 8 allergy & immunology physician records with the nearest ZIP codes
- Yael Gernez-Goldhammer, M.D., PHDPalo Alto, CA 943041659792125
- Sara Kleinman, M.D.Palo Alto, CA 943041154610517
- Katherine Konvinse, MD, PHDPalo Alto, CA 943041639707680
- Anne Liu, M.D.Palo Alto, CA 943041821044314
- Anjuli Mehrotra, MDPalo Alto, CA 943041629187984
- Carlos Salgado, MDPalo Alto, CA 943041275064388
- Sayantani Sindher, MDPalo Alto, CA 943041366739740
- C. Garrison Fathman, MDStanford, CA 943051770619926
Common questions
What is Joseph Demetrius Hernandez, MD, PHD's NPI number?
Joseph Demetrius Hernandez, MD, PHD's National Provider Identifier (NPI) is 1104052232, issued on Jun 3, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Joseph Demetrius Hernandez, MD, PHD located?
The NPPES record lists a practice address at 725 Welch RD, Palo Alto, CA, 94304. Phone: (650) 497-8000. Providers update this record themselves, so call before visiting.
How can I verify Joseph Demetrius Hernandez, MD, PHD's license?
NPPES lists California license number A107450, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
What is Joseph Demetrius Hernandez, MD, PHD's MIPS final score?
The 2023 MIPS final score is 76.5 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.